Хир кайăк йышшисем
Хир кайăк йышшисем (лат. Otididae) — Ватă çутăран пысăк вĕçен кайăк çемьи.

Литература 
 
 Sibley, Charles G.; Jon E. Ahlquist (1990). Phylogeny and Classification of the Birds : A Study in Molecular Evolution. New Haven: Yale University Press. ISBN 0-300-04085-7.
 Knox, Alan G.; Martin Collinson, Andreas J. Helbig, David T. Parkin & George Sangster (October 2002). «Taxonomic recommendations for British birds». Ibis 144 (4): 707—710. .
 Ecology and conservation of Steppe-Land birds by Gerard Bota et al. International Symposium on Ecology and Conservation of Steppe-land birds. Lynx Edicions 2005. 343 pages. ISBN 84-87334-99-7

Каçăсем 
 Bionet škola
 Дрофиные на сайте montereybay.com